Turning machine



Oct. 31, 1933.

G. F. YAGER TURNING MACHINE Filed March 10, 1930 &

WFQZLWW ATTORNEYS 4 Sheets-Sheet l G. F. YAGER TURNING M AGHIN E Oct. 31, 1933.

Filed March 10, 1930 4 Sheets-Sheet 2 INVENTOR 0/ z 7 0 5 o W 0 v g 5 40 v0 rill-Jill? 4 V 4m? 3 7 BY @607 1 I r ATTORNEYS Oct. 31, 1933. YAGER 1,933,201

TURNING MACHINE INVENTOR w mw mM WW ATTORNEYS Oct. 31, 1933. e. F. YAGER 0 TURNING MACHINE Filed March 10, 1930 4 Sheejcs-Sheet 4 INVENTOR ATTORNEYS Patented Oct. 31, 1933 PATIENT OFFICE UNITED! STATES-.7

1,933,201 TURNING MACHINE GeorgeF. Yager, Toledo, Ohio, assignor to The Bunting Brassand Bronze Company, Toledo,

Ohio, a corporation. of :Ohio

Application March' 10,1930. Serial No. 434,797

' 14 Claims.-

This invention relates to metal working ma chines and has particular reference to machines for turning orotherwise fashioning bushings and the like. i

One-of the-principal objects of this invention.

is to providea machine of the; type specified above which is thoroughly automatic in operation and which materially expedites production owing to the rapidity with which the same operates.

Another object of this invention is to provide' Work holding means operable to position the work in proper relation to thetool irrespective of-variations in dimensions of the work and'to associate with the I holding means stripping mechanism for automatically releasing the work,

from the holder upon completion of the, fashioning operation.

With the foregoing as well as view the invention resides in the-peculiar COII'.

struction of machine and the expedient manner in which the samefunctions to fashion the work which will be made more apparent as-this description proceeds, especially Whenconsideredjin connection with the accompanying drawings,

Figure 4 is a sectional view taken on the line" 4-4 of Figure 1.

Figure 5 is a semi-diagrammatic view illustrating the mechanism. for actuating the tool,

carriage.

Figure 6 is a sectional view taken on 6-5 of Figure 5.-

Figure 7 is a sectional view taken on the line '7-7 of Figure 3.

Figure 8 is a'sectional view taken on the line 88 of Figure 3.

the line Generally described, the machine illustratedherein is-especially designed for turning bushings and the like to a predetermineddiameter and comprises a frame 10 anda pair of co.-- axially arranged spindles 11 and 12 carried by the heads 13 and 14, respectively, which in turn are slidably mounted-upon the-frame 10.- The spindles 11 and 12 are mounted within the heads 13 and 14 for both-reciprocable and-rotative movements relative to the heads and are operable in one position to engage opposite ends of other, objects in.

the bushing toclamp the same in operative posi:

tion with thetool carrying slide 15. 'The tool carrying slide 15 .isrmounted for reciprocable.

movement in apath'substantially parallel to the axis of the spindles 11 and.12 and is adapted to' carry a tool 16 for finishing the exterior surface;

of the bushing.

As will be morefully hereinafter described,

the bushings arenautomatically fed to a suitable transfer device illustrated generally by: the refe erence character 1'7 'by' means of :the downward-.

ly inclined chute 18. The transfer device is pivotally mounted upon a bracket 19 rigid with thehead '14 and is adapted to :be'operatedby a suitable cam in time relation to the, movementr5 of-the spindles 11 and.12 for releasing the bushing just completed to automatically transfer the bushing from the chute 18 :to a position to be engaged by the work clamping means when 'the spindles are movedinwardly into operative position. After the spindles have been moved to a position wherein the work is rigidly clamped in-place, the tool carrying slide 15 is moved in a direction parallel to the axis of the bushing permittingthe tool 16 carried thereby to move across theface of the bushing. Upon com-.

pletion of'the aforesaid movement of the tool .the spindles 13 and 14' are imovedaway from each other to release the-bushing and the transfer' device is actuated to place another bushing in operative position with the clamping means. The successive operations of the transfer device spindles and tool slide 15' are so timed that upon I one complete cycle of operation of bushings are completed.

Referring now more in detailto the specific the tool, two

construction of the machine illustrated andwith special reference to Figure '1, it willbe noted:

that the machine comprises a drive shaft 20 driven at a comparatively slowrate of .speed through the reduction gearing 21 by a stub shaft "22 having a'pulley 23 thereon adapted to be connected to a suitable source of power (not' shown). '24is a stub shaft journaled in a bracket 24rigid with'the frame 10; 25 is a pinion on the stub shaft 24vand meshing with a gear 25" v on a cam shaft 26 journaled at its opposite ends in brackets 24and 26"; 27 and 27' are change gears rigid with the drive and stub' shafts. 20

and 24, and 23 isa clutch collar on the stub.

shaft 24 controlling the driving connectionbetween the stub shaft 24 and pinion 25-.

29 is a lever for actuating the clutchcollar 28-; 29"

is a-shaft journaled in the frame 10 for actuating 110.

the lever 29, and 29" is an operating lever for the shaft 29.

Secured to the cam shaft 26 in spaced relation to each other are cam drums 30, 31 and 32. The cam drum carries a pair of cams 33 and 34 respectively adapted to control the operation of the push rod 35 for moving the bushingsinto the transfer device 17 and the reciprocable movement of the spindle 12. The cam drum 31 carries a cam 31' having a cam groove 36 adapted to control the reciprocable movement of the spindle 11 and is further provided with a cam surface 37 for controlling the operation of the transfer device. 7 The cam drum 32 carries a cam 32 having a cam groove 38 for controlling the sliding movement of the tool carriage 15. The above described cam surfaces are all fashioned to perform the various operations in sequence and in timed relation to each other as specified in the preceding description. The cam shaft 26 also has secured thereto a suitable brake mechanism 39 for maintaining the shaft steady during operation thereof.

In order to establish a connectionbetween the cam groove 33 and push rod 35 for reciproeating the latter, I provide a lever 40 pivotally mounted intermediate the ends thereof as at 41 to a bracket 41' rigid with the frame of the machine and having the lower end engaging within the cam groove 33 and normally maintained in engagement with the cam surface by means of a suitable coil spring 42 having one end secured to the frame 10 and the opposite end secured to the lever 40 below the pivot 41. The upper end of the lever 40 is secured to the outer end of the plunger 35 as at 43 for moving the same axially. The disposition of the plunger 35 upon the machine is such that upon inward movement of the same, it engages the lowermost bushingon the chute 18 and moves the same into the transfer device 1'7.

After the bushing, above referred to, has been moved into the transfer device 17, the cam surface 37 swings the transfer device 17 about its pivot 19' so as to position the bushing in operative relation between the spindles 11 and 12. The connection between the cam surface 37 and transfer device for accomplishing the above purpose comprises a bell crank lever 44 pivoted at 45 upon a bracket 44 rigid with the frame of the machine and has the short arm 46 thereof extending at substantially right angles to the other arm 47 and engageable'with the cam surface 37. The upper end of the lever '47 is connected by means of a rod 48 to the transfer device 17 at a point spaced from the pivot 19. The cam surface 37 is so designed that upon one revolution thereof the transfer device 17 is operated twice to move a bushing in operative relation between the spindles 11 and 12. Suitable adjustable stops 49 and 50 are provided for controlling the movement of the transfer device with the result that when the latter is in engagement with the stop 49, it will be in accurate position to engage a bushing from the chute 18 and when in engagement with the stop 50, the bushing carried thereby will be in accurate alignment with the spindles. The transfer device 17 is mounted upon one side of the chute and comprises a pair of pivotal jaws 51 and 52 normally urged into clamping engagement by suitable coil spring 53.

After the bushing, carried by the transfer device, is moved to operative position between the spindles 11 and 12, the cam grooves '34 and 36 oted upon brackets 41' and 44.

operate to move the spindles inwardly for clamping the bushing in place. The cam grooves 34 and 36 are respectively connected to the outer ends of the spindles l1 and 12 by means of levers 54 pivotally connected intermediate their ends as at 55 to the heads 13 and 14 and having the upper ends thereof connected to the outer ends of the spindles 1-1 and 12 in any suitable manner. The lower ends of the levers 54 are provided with sleeve-like extensions 56 having springs 57 therein surrounding the actuating rods 58. The actuating rods 58 extend axially through the sleeves 56 and the inner ends thereof have ball and socket connections with levers 58' piv- Rollers 56' carried by studs 56" in levers 58 travel in cam grooves 34 and 36. The outer ends of the rods 58 extend through the end walls of the machine frame and have square end portions adapted to be engaged by a suitable tool, whereby the rods may be turned to effect the desired adjustment. As shown in Figure 1, I provide plungers 60 threadedly engaging the rods 58 intermediate the ends thereof and having portions extending within the sleeves 56 for engagement with the inner ends of the springs'57. The outer ends of the springs 57 engage suitable closure members 61 surrounding and slidably mounted upon the rods 58. The arrangement is such that upon rotation of the rods 58, the plungers 60 will function to rock the lever 54 about its pivot 55 -to adjust the levers 54 and spindles 11 and 12 to compensate for bushings of various lengths. Likewise, rotation of the members 61 relative to the sleeves 56 varies the tension of the springs 57.v

The cam grooves 34 and 36 are oppositely disposed so that the spindles 11 and 12 are simultaneously moved toward and away from each other. Moreover, as will be understood from the foregoing description, the connections between the levers 54 and actuating rods 58 permit relative movement between the rods and the levers so that after sufficient pressure is exerted by the spindles on opposite ends of the bushing further movement of the spindles toward each other is prevented and merely absorbed by the *coil springs 57'. By reason of this construction any danger of deforming or otherwise effecting the contour of the bushing by the clamping operation is reduced to the minimum.

After the spindles 11 and 12 have been moved by the cam surfaces 34 and 36 to clamp a bushing therebetween, the cam surface 38 functions to move the tool carriage 15 substantially the length of the bushing to permit the tool 16 carried thereby to finish the bushing. The connection between the cam groove 38 and tool carriage comprises a pair of levers 62 and 63 mounted upon the shafts 60' having the opposite ends journaled in brackets 62, 62" rigid with the frame of the machine. The lever 62 has the upper end thereof operatively connected by a link 66 to the tool carriage 15 for actuating the latter and has a turnbuckle connection at its F- lower end to the lever 63 at the upper end thereof. The lower end of the lever 63 is pivoted to the bracket 63 and the upper end carries a suitable roller- 64 that travels in "the cam Adjustment of the turnbuckle is groove 38. made to place the tool 16 in proper position to engage the work. Preferably the outer ends of the turnbuckle bolts 69 and 69' are slldable vertically'in T slots 69" in the levers 62 and 68" to vary the throw of the lever 62. Thus variation in thethrow of thelver 62 causesa corresponding variation in the movement of the slide 15, whereby the tool I6 carried thereby may operate upon bushings of various lengths. In this connection it is to be noted that the depth of cut of the tool 16 maybe regulated by means of the screw '70 which is adapted to move the tool holder in a direction transverse to the direction of movement of the tool carriage.

After tlie bushing has been clamped in place er than'the force exerted by thejaws 51 and 52 with the result that the latter will readily operate to release the bushing upon movement thereof to the position set forth above. 'After the tool has been moved across the bushing, the cam surfaces 34 and 36 function to move the spindles 11 and 12 outwardly to release the work and permit the same to fall upon the discharge chute 72. When the foregoing operation is'accomplished, the cam surface 33 operates to actuate the push rod 35 to move a bushing from the chute 18 into the jaws carried by the transfer device and the latter-is moved by the cam surface 37 to position the bushing in proper position to be clamped between the spindles 11 and 12 upon movement thereof. The tool slide 15 is then caused to move back to its initial position during which time the tool 16 functions to finish the bushing to be operated upon. Thus, from the foregoing it will be observed that the operation of the machine is thoroughly automatic and a bushing is completed upon each movement'of the tool slide or, in other words, two bushings are completed upon one cycle of operation of the tool slide 15.

In order to compensate for bushings of various diameters, the cam 37 has a slotted connection withthe cam' drum Blpermittirig the,

former to be adjusted to vary the operation of the transfer device 17. will further be observed that the chute 18 may be. angularly adjusted relative to its support so as to change the position of the delivery end thereof relative to the transfer device. As shown, the lower end. portion of the chute is provided with a depending projection 73 pivotally connected as at 74to a bracket '74 slidable horizontally on the frame 10 of the machine and bushing inoperative position and with specialreference to Figure 3, itvwill be noted that I provide arbors 7'7 and 78 secured within suitable recesses formed in the ends of the spindles 11 and .12, respectively, by means of the tie bars 79 extending through. the spindles and secured to the outerends thereof bymeans of the nuts In this connection it is to be In this connection it:

80. In-detaiLthe arbors 77 and '78, are provided with tapered portions 81 adapted to seat within the correspondingly shaped recesses formed in the ends of the spindles and are provided with inwardly extending projections 82 arranged concentric withthe spindles and having. openings 83 therethrough intermediate the ends thereof and extending transversely tothe axis of rotation. The openings 83 are of sufficient dimension to receive the rockers 84--having semispherical outer faces 85 rockably engaging theouter walls 86 of the openings 8-3and having inner substantially flatsurfaces 87 for engagement with the bushing. The rockers are held in proper position within the openings 83 by means'of pins 88 extending transversely through the openings 83 and adapted to engage within suitableslots 89 formed in the fiat surfaces 87 'of the rockers; The arrangement is such as to permit universal movement of the rockers 84 within the openings 83 relative to the arbors; When a bushing is clamped in place, as shown in Figure 3, the extremev inner ends of the projections 82 in advance of the rockers extend within the opposite ends of the bushing and are substantially the same" diameter as the inner diameter-of the bushing so as to accurately position the latter concentric with the axis of IO-' tation. In this connection it will further be observed from the above figure that the substantially flat surfaces 87 ofthe rockers pro to engage the end portions of the bushing.

11 and 12 are moved inwardly, the bushing is rigidly clamped between the flat surfaces 87 of the rockers and owing to the fact that thelatter are capable of universal movement relative to the arbors any irregularities in the ends of the bushing will be compensated for and will not affect the clamping action. The above construction permits turning the bushings to proper diameter prior to squaring the ends thereof and is one of the important features of this invention.

In order to facilitate release of the bushing from th'earbors 82 upon movement of the spindles outwardly, I provide suitable stripping means which'as shown in Figure 3 comprises substantially cup-shaped members 90 having enlarged tubular portions 91 surrounding the inner ends 92 of the spindles and having reduced inwardly extending tubular portions 93 surrounding the projections 82 of the arbors and slotted as at 94to receive the projecting ends of the rockers 84. The extreme inner ends of the tubular'portions 93- are yieldably main tained out of engagement with the opposite ends of the bushing by means of coil springs 95 arrangedwithin recesses 96 formed in the inner end portions of the spindles. Each of the enlarged tubular portions 91 of the cup-shaped members 90 is provided with an adjustable collar 97. In use these collars are adapted to be held by clamp screws 97' in proper spaced relation to thrust bearings 97" so that engagement of the collars with the thrust bearings, when the cup-shaped members 90 are moved outwardly, causes the bushing to be stripped from arbors 82.

As shown more particularly in Figure 1, the heads 13 and 14 are also capable of adjustment 7 to permit the machine to be utilized for fashioning bushings of different lengths. Preferthe spindles 11 and 12 by meansof'the adjustject beyond the opening 83 a sufiicient distance By 'virtue of this arrangement when the spindles law able elements 98 carried by the frame 10 of the machine. g

The spindles 11 and 12 may be rotated in any suitable manner but, as shown in Figure 1, are preferably independently rotated from a suitable source .of power. In detail, each of the spindles 11 and 12 have secured thereto intermediate the ends thereof a pulley 99 for receiving a suitable belt 100 extending from the source of power. The belts 100 for rotating. the spindles preferably extend through suitable slots formed in the upper portions of the slidabie heads 13 and 14 and are' enclosed by the guards 101 secured to the heads aforesaid.

Referring again toFigure 1 of the-drawings,

it will be noted that I have provided means for 7 manually rotating the cam shaft 26 so as to facilitate initially setting-up the machine. accomplishing this result, I provide a pinion 102 meshing with the camshaft gear 25. The ,pinion 102 is preferably secured to a stub shaft 103 having the outer ends thereof projecting through one end wall of thebracket 24' and squared for the reception of a suitable crank or other actuating member (not shown).

Thus, from the foregoing it will be observed that I have provided a machine which is thoroughly automatic in operation and one which materially expedites production owing to the.

expedient manner in which the same functions to fashion the work. It will further be apparent that I have provided a machine of the type specified above having numerous adjustments which permit the same to be readily j utilized for fashioning articles of different dimensions and also that I have provided im proved means for clamping the articles in the machine which compensates for any irregularities in the articles and which is entirely automatic in operation.

While in describing the machine, illustrated herein, particular stress has been placed upon the association thereof for fashioning bushings, it should be understood that the inventive principles involved herein may be employed in numerous metal working machines and reservation is made to make such changes in the construction as may come within the purview of the accompanying claims.

What I claim as my invention is:

1. In a machine for fashioning bushings and the like, the combination of a pair of co-axially extending arbors having circular end portions arranged to engage within the opposite ends of the bushing and having transversely extending openings therethrough adjacent the end portions aforesaid, means for simultaneously reciprocating and rotating said arbors, and members mounted within said openings for rocking movement relative to the arbors and having portions engageable with the opposite ends of the bushing upon movement of the arbors toward each other to clamp the bushin in position therebetween and means automal'ally operable upon movement of the arbors away from eachpther to strip the bushing from the circular end portions,

of the arbors.

2. In a machine for fashioning bushings and the like, the combination with a pair of co-. axially extending s indies and means for simultaneously rotating and reciprocating said spindles, of arbors carried by said spindles having circular end portions operable upon movement of the spindles toward each other to extend within opposite ends'of the bushing, said arbors For .therethrough adjacent the end portions aforesaid, members mounted within the openings for rocking movement relative to the arbors and having portions engageable with the opposite ends of the bushing to clamp the same to the arbors, and strippers mounted for sliding movement independent of the spindles and normally yieldably maintained in engagement with the opposite ends of the bushing for stripping the latter from the circular end portions of the arbors upon movement of the spindles away from each other.

3. In a metal working machine, the combination witha pair of co-axially extending spindles and means for rotating and reciprocating said spindles, of arbors secured to the inner ends of each of said spindles and having portions projecting inwardly from the latter, clamping means upon the inwardly projecting portions of the arborsoperable upon movement of the spindles inwardly to clamp the work in operative position, a pair of substantially cup-shaped members having enlarged tubular portions slidably engaging the inner end portions of the spindles and having reduced tubular portions slidably engaging the inwardly projecting portions aforesaid .of the arbors and contacting with the opposite ends of the work, and yieldable means normally urging said cup-shaped members inwardly into engagement with opposite ends of the work for stripping the latter from the arbors upon movement of the spindles away from each other.

4. In a metal working machine, the combination with a support and a carriage slidably mounted upon the support, a cam for automatically actuating said carriage, means establishing an operative connection between the cam and carriage including, a lever pivotally connected to the support intermediate the ends thereof and having one end engaging the carriage and the opposite end terminating adjacent the cam, a second lever pivotally mounted upon the support adjacent the last-mentioned end of the lever aforesaid and having a portion engageable with said cam for actuation thereby and an adjustable link establishing a connection between said levers for adjusting the position of the carriage relative to the support and for varying the stroke of the first-mentioned lever to adjust the reciprocable movement of the carriage.

5. In a machine for fashioning bushings and the like, the combination with means for clamping the bushing in place, of a tool carrying slide reciprocable in a path parallel to the axis of the bushing, means for automatically reciprocating said slide a distance substantially equal to the length of the bushing including, a rotatable element having a cam surface, a lever pivotally connected to a support substantially below the cam and having the upper end thereof engaging the cam surface, a second lever pivotally mounted intermediate the ends thereof and having the .one end connected to the tool slide and the opposite end terminating adjacent the pivotal L'IK ments in said heads, thrust bearings for the spindles carried by the heads, arbors for supporting a bushing carried by said spindles, and means for releasing the bushing from the arbors including members having tubular portions sleeved upon the inner ends of said spindles and having reduced tubular portions sleeved upon the arbors, yieldable means carried by the spindles and urging the members away from each other, and adjustable collars on the members engageable with the thrust bearing aforesaid when the spindles are moved longitudinally to strip a bushing from the arbors.

7. In a machine of the class described, a frame, substantially aligned heads on the frame, spindles mounted for rotary and longitudinal movements in said heads, thrust bearings for said spindles carried by said heads, arbors for supporting a bushing carried by said spindles, rockers carried by said arbors for clamping engagement with a bushing on said arbors, and stripping means for releasing the bushing from the arbors, including tubular members sleeved upon the inner ends of the spindles and having reduced portions sleeved upon the arbors and slotted to receive the rockers, and means on the members engageable with the thrust bearing aforesaid when the spindles are moved longitudinally to strip a bushing from the arbors.

8. In a machine of the class described, a frame, substantially aligned heads on the frame, spindles mounted for longitudinal movement in said heads, arbors for supporting a bushing carried by said spindles, and stripping means for releasing the bushing from the arbors including members having portions sleeved upon the inner ends of the spindles and having portions sleeved upon the arbors, yieldable means carried by the spindles urging the members away from each other, rollers on the members, and means carried by the heads engageable by the collars when the spindles are moved longitudinally to cause the portions aforesaid sleeved upon the arbors to strip a bushing therefrom.

9. In a machine of the class described, a frame, substantially aligned heads on the frame, rotary spindles mounted in said heads for movement toward and away from each other, thrust bearings for the spindles carried by the heads, work engaging arbors carried by said spindles, means carried by the arbors and operable upon movement of the spindles toward each other to clamp work on the arbors, and means associated with the spindles and thrust bearings and operable when the spindles are moved away from each other to strip the work from the clamping means and arbors.

10. In a machine of the class described, a frame, opposed rotary spindles mounted for longitudinal movement on said frame, work engaging arbors projecting endwise from the spindles, and work stripping means carried by the spindles and associated with the arbors and frame in such a way that work engaged by the arbors will be stripped therefrom upon movement of the spindles longitudinally in one direction relative to the frame.

11. In a machine of the class described, a frame, opposed rotary spindles mounted for longitudinal movement on said frame, work engaging arbors projecting endwise from the spindles, means carried by the spindles for stripping work from the arbors, means associated with said stripping means and spindles for normally holding the stripping means inoperative, and means carried by the stripping means and engageable with parts rigid with the frame when the spindles are moved longitudinally to cause the stripping means to operate.

12. In a machine of the class described, a frame, opposed rotary spindles mounted for longitudinal movement on said frame, work supporting arbors projecting endwise from the spindles, means carried by said arbors and operable upon movement of the spindles in one direction to clamp work on the arbors, and means associated with the spindles and parts rigid with the frame and operable upon movement of the spindles longitudinally in the opposite direction for stripping work from the clamping means and arbors.

13. In a machine of the class described, a frame, substantially aligned heads on the frame, rotary spindles carried in said heads for movement toward and away from each other, thrust bearings for the spindles carried by the heads, work engaging arbors carried by said spindles, means carried by the arbors and operable upon movement of the spindles toward each other to clamp work on the arbors, work engaging members mounted for longitudinal movement on the spindles, yieldable means associated with the spindles and members for holding the latter in J spaced relation to the work, and means associated with the members and engageable with the 115 bearings when the spindles are moved away from each other to cause the members to move longitudinally of the spindles and strip the work from the work clamping means and arbors.

14. In a machine of the class described, a 2 frame, substantially aligned heads on the frame, rotary spindles mounted in said heads for movement toward and away from each other, work engaging arbors carried by said spindles, means associated with the arbors and operable upon 125 movement of the spindles toward each other to hold the work in engagement with the arbors, work engaging members mounted for longitudinal movement on the spindles, means associated with the spindles and members for holding the latter inoperative when the work is held in engagement with the arbors, and means associated with the members and parts rigid with the frame and operable when the spindles are moved away from each other to cause the members to move longitudinally of the spindles and strip the work from the work holding means and arbors.

GEORGE F. YAGER. 

